package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * 课程模块的Dao层的实现类
 */
public class CourseDaoImpl implements CourseDao {

    //查询课程列表信息
    @Override
    public List<Course> findCourseList() {
        try {
            //1.创建QueryRunner
            QueryRunner qr=new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL
            String sql="SELECT id,course_name,price," +
                    "sort_num,STATUS FROM course " +
                    "WHERE is_del=?";
            //3.执行查询
            List<Course> courseList = qr.query(sql, new BeanListHandler<Course>(Course.class), 0);
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }

    //根据条件查询课程信息
    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {
        try {
            //1.创建QueryRunner
            QueryRunner qr=new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL，当前的查询为多条件不定项查询
            //2.1创建StringBuffer对象，将SQL字符串 添加进缓存区
            StringBuffer sb=new StringBuffer("SELECT id,course_name,price,sort_num,STATUS FROM course WHERE 1=1 AND is_del=? ");
            //2.2创建List集合 保存参数
            List<Object> list=new ArrayList<>();
            list.add(0);

            //2.3判断传入参数是否为空
            if(courseName!=null && courseName!=" "){
                sb.append(" AND course_name LIKE ?");
                courseName= "%"+courseName+"%";
                list.add(courseName);
            }
            if(status!=null && status!=" "){
                sb.append(" AND STATUS = ?");
                //将status 转换为INT
                int i = Integer.parseInt(status);
                list.add(i);
            }

            //执行查询
            List<Course> list1 = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());
            return list1;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //保存课程营销信息
    @Override
    public int saveCourseSalesInfo(Course course) {
        try {
            //1.创建QueryRunner
            QueryRunner qr=new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL
            String sql="INSERT INTO course(\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "STATUS,\n" +
                    "create_time,\n" +
                    "update_time\n" +
                    ")VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

            //3.准备参数
            Object[] param={course.getCourse_name(),course.getBrief(),course.getTeacher_name()
                    ,course.getTeacher_info(),course.getPreview_first_field(),course.getPreview_second_field()
            ,course.getDiscounts(),course.getPrice(),course.getPrice_tag(),course.getShare_image_title()
            ,course.getShare_title(),course.getShare_description(),course.getCourse_description(),course.getCourse_img_url()
            ,course.getStatus(),course.getCreate_time(),course.getUpdate_time()};

            //4.执行插入操作
            int row = qr.update(sql,param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    @Override
    public Course findCourseById(int id) {
        try {
            QueryRunner qr=new QueryRunner(DruidUtils.getDataSource());
            String sql="select id,course_name,brief,teacher_name,teacher_info,preview_first_field," +
                    "preview_second_field,discounts,price,price_tag,course_img_url,share_image_title," +
                    "share_title,share_description,course_description,STATUS from course where id=?;";
            Course course = qr.query(sql, new BeanHandler<Course>(Course.class), id);
            return course;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    @Override
    public int updateCourseSalesInfo(Course course) {
        try {
            QueryRunner qr=new QueryRunner(DruidUtils.getDataSource());
            String sql="update course set course_name=?,brief=?,teacher_name=?,teacher_info=?," +
                    "preview_first_field=?,preview_second_field=?,discounts=?,price=?,price_tag=?," +
                    "share_image_title=?,share_title=?,share_description=?,course_description=?," +
                    "course_img_url=?,update_time=? where id=?";
            Object[] param={course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
            course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),
            course.getShare_image_title(),course.getShare_title(),course.getShare_description(),course.getCourse_description(),
            course.getCourse_img_url(),course.getUpdate_time(),course.getId()};
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    @Override
    public int updateCourseStatus(Course course) {
        try {
            QueryRunner qr=new QueryRunner(DruidUtils.getDataSource());
            String sql="update course set status=? ,update_time=? where id= ?";
            Object[] param={course.getStatus(),course.getUpdate_time(),course.getId()};
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }
}
